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#!/usr/bin/env python
"""
Tiny Syslog Server in Python.
This is a tiny syslog server that is able to receive UDP based syslog
entries on a specified port and save them to a file.
That's it... it does nothing else...
There are a few configuration parameters. These can be set via env vars.
Usage: sudo ./syslog_server.py
"""
import os
import logging
import socketserver
# User Configuration variables:
LOG_FILE = os.environ.get('LOG_FILE', 'syslog.log')
HOST = os.environ.get('HOST', "0.0.0.0")
PORT = int(os.environ.get('PORT', 514))
logging.basicConfig(
level=logging.INFO,
format='%(message)s',
datefmt='',
filename=LOG_FILE,
filemode='a'
)
class SyslogUDPHandler(socketserver.BaseRequestHandler):
""" A handler """
def handle(self):
""" Handle data """
data = bytes.decode(self.request[0].strip())
# socket = self.request[1]
print(f"{self.client_address[0]}: {str(data)}")
logging.info(str(data))
if __name__ == "__main__":
try:
server = socketserver.UDPServer((HOST, PORT), SyslogUDPHandler)
print(f"Starting server on host {HOST}:{PORT} using file {LOG_FILE}...")
server.serve_forever(poll_interval=0.5)
except PermissionError:
print("Permission denied while trying to start the server. Try sudo.")
except (IOError, SystemExit): # pylint: disable=try-except-raise
raise
except KeyboardInterrupt:
print("\nShutting down...")
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